Let A and B represent the governor's salaries of states A and B, respectively.
A - B = 53,435
A +B = 290,395
Add these two equations to eliminate B.
2A = 343,830
A = 171,915
B = A -53,435 = 118,480
The governor of state A has a salary of 171,915.
The governor of state B has a salary of 118,480.